The Effects of Preparations of Human Chorionic Gonadotropin on AIDS-Related Kaposi's Sarcoma
Parkash S. Gill, M.D., Yanto Lunardi-Iskandar, M.D., Ph.D., Stan Louie, Pharm.D., Anil Tulpule, M.D., Tong Zheng, D.D.S., Byron M. Espina, A.B., Jacques M. Besnier, M.D., Philippe Hermans, M.D., Alexandra M. Levine, M.D., Joseph L. Bryant, D.V.M., and Robert C. Gallo, M.D.
Background Kaposi's sarcoma is the most common cancer in patientswith the acquired immunodeficiency syndrome (AIDS). Recently,certain preparations of human chorionic gonadotropin (hCG) havebeen shown to inhibit the growth of Kaposi's sarcoma cell linesin vitro and in immunodeficient mice.
Methods After in vitro evaluation of four commercially availablehCG preparations, the most active product was evaluated in 36patients with AIDS-related Kaposi's sarcoma. In a phase 12trial, 24 patients received intralesional injections of hCGthree times a week for two weeks at doses of 250, 500, 1000,or 2000 IU (6 patients each). In each patient three nodularlesions were injected, two with the drug and one with diluentalone. In a double-blind trial, 12 additional patients wererandomly assigned to receive intralesional injections of 2000IU of hCG or diluent alone (6 patients each; two lesions perpatient). At the conclusion of therapy, the lesions were measured,their gross appearance assessed, and biopsy specimens evaluated.
Results A.P.L. (WyethAyerst), which had the most in vitroactivity against Kaposi's sarcoma cell lines, was selected forthe clinical investigation. Treatment with A.P.L. was well toleratedat all doses. In the cohorts given 250, 500, 1000, and 2000IU, 1, 5, 5, and 10 of the 12 injected lesions responded, respectively(P = 0.03 for trend). Complete tumor regression was observedin one lesion each at the 250-IU and 500-IU doses, in two lesionsgiven the 1000-IU dose, and in five lesions given the 2000-IUdose. In the double-blind study, none of the 12 lesions in thesix patients injected with diluent had responses, as comparedwith 10 of the 12 lesions in the six patients injected withhCG (P = 0.015). Microscopical evidence of apoptosis was observedonly in hCG-treated lesions. The percentage of cells that diedincreased in a dose-dependent manner (P<0.001). Serum levelsof follicle-stimulating hormone (P = 0.002) and luteinizinghormone (P = 0.001) declined after the last injection of hCG,but there was no effect on these hormones in the diluent-treatedpatients.
Conclusions The intralesional injection of hCG induces the regressionof AIDS-related Kaposi's sarcoma lesions in a dose-dependentmanner. The response of these tumors appears to be mediatedby the induction of apoptosis.
Source Information
From the Departments of Internal Medicine (P.S.G., A.T., T.Z., B.M.E., A.M.L.) and Pharmacy (S.L.), University of Southern California School of Medicine, Los Angeles; the Institute of Human Virology, University of Maryland, Baltimore (Y.L.-I., J.L.B., R.C.G.); the Department of Infectious Diseases, St. Pierre Hospital, Université Libre de Bruxelles, Brussels, Belgium (P.H.); and the Gynecology and Obstetrical Medical Center, Paris (J.M.B.).
Address reprint requests to Dr. Gill at the University of Southern California, Norris Cancer Hospital and Research Institute, 1441 Eastlake Ave., Rm. 162, Los Angeles, CA 90033.
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